1. 11.4 HUMAN
REPRODUCTION
IB BIOLOGY

2. LET’S TALK ABOUT (ALL THE STUFF
THAT HAPPENS BEFORE AND
AFTER) SEX
What do you remember from the video?
Melinda and Sergio

7. THE SPERM

8. THE SPERM

9. SPERMATOGENESIS
List the 5 different cell stages of sperm development.

10. SPERMATOGENESIS
Spermatogonia
Primary spermatocyte
Secondary spermatocyte
Spermatid
Sperm

16. THE OVUM

17. THE OVUM

18. OOGENESIS
What are the 5 cell stages in ovum development?

19. OOGENESIS
Oogonium
Primary oocyte
Secondary oocyte
Ootid
Ovum

31. STOP HAMMER TIME.
.
…ALSO REVIEW TIME

32. SPERMATOGENESIS
VS OOGENESIS
Spermatogenesis
Location
Oogenesis
Testis
Ovary
Number of gametes produced Life long production
Fixed amount
Gametes per germ cell
Four
One
Beginning of process
Begins at puberty
Begins during fetal
development
Timing of gamete formation
Continuous (any
time)
Once a month
(menstrual cycle)
End of process
Fertility is life long
but reduces
Fertility stops at
menopause
Timing of gamete release
Any time
Monthly cycle
Meitoic divisions
Uninterrupted
Arrested
Germ line epithelium
Involved in gamete
production
Not involve in gamete
production

33. FERTILIZATION
What are the 3 main stages of fertilization?

34. FERTILIZATION
Acrosome reaction
Penetration of the egg membrane
Cortical reaction